Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL076470 |
Rate of Mass Loss Across the Instability Threshold for Thwaites Glacier Determines Rate of Mass Loss for Entire Basin | |
Waibel, M. S.1; Hulbe, C. L.2; Jackson, C. S.3; Martin, D. F.4 | |
2018-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:2页码:809-816 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; New Zealand |
英文摘要 | Rapid change now underway on Thwaites Glacier (TG) raises concern that a threshold for unstoppable grounding line retreat has been or is about to be crossed. We use a high-resolution ice sheet model to examine the mechanics of TG self-sustained retreat by nudging the grounding line just past the point of instability. We find that by modifying surface slope in the region of the grounding line, the rate of the forcing dictates the rate of retreat, even after the external forcing is removed. Grounding line retreats that begin faster proceed more rapidly because the shorter time interval for the grounding line to erode into the grounded ice sheet means relatively thicker ice and larger driving stress upstream of the boundary. Retreat is sensitive to short-duration re-advances associated with reduced external forcing where the bathymetry allows regrounding, even when an instability is invoked. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425514300037 |
WOS关键词 | ANTARCTIC ICE-SHEET ; AMUNDSEN SEA EMBAYMENT ; WEST ANTARCTICA ; PINE ISLAND ; SHELF ; RETREAT ; WIDESPREAD ; COLLAPSE ; FLOW ; BED |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26875 |
专题 | 气候变化 |
作者单位 | 1.Portland State Univ, Dept Geol, Portland, OR 97207 USA; 2.Univ Otago, Natl Sch Surveying, Dunedin, New Zealand; 3.Univ Texas Austin, Inst Geophys, Austin, TX USA; 4.Lawrence Berkeley Natl Lab, Appl Numer Algorithms Grp, Berkeley, CA USA |
推荐引用方式 GB/T 7714 | Waibel, M. S.,Hulbe, C. L.,Jackson, C. S.,et al. Rate of Mass Loss Across the Instability Threshold for Thwaites Glacier Determines Rate of Mass Loss for Entire Basin[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):809-816. |
APA | Waibel, M. S.,Hulbe, C. L.,Jackson, C. S.,&Martin, D. F..(2018).Rate of Mass Loss Across the Instability Threshold for Thwaites Glacier Determines Rate of Mass Loss for Entire Basin.GEOPHYSICAL RESEARCH LETTERS,45(2),809-816. |
MLA | Waibel, M. S.,et al."Rate of Mass Loss Across the Instability Threshold for Thwaites Glacier Determines Rate of Mass Loss for Entire Basin".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):809-816. |
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